Dual valve control for gas burners



April 10, 1945. G. KLEIN DUAL VALVE CONTROL FOR GAS BURNERS Filed April .5. 1944 ATTO ENE) Patented Apr. 10, 1945 v UNITED STATES 1 PATENT OFFICE DUAL VALVETCONTROL FOR GAS BURNERS v I I Gustav Klein, Elkins Parh Pa.

Application A ril-s, 1944, Serial No. 529,380

3 t 2 Claims. (.01. 16149) Ingas burners such as those used in gas ranges, it is desirable to have a dual burner ring one producing a relatively small or simmering flame, and the other producing a relatively high flame, the burners being intended to be used separately orjointly, and for predetermined lengths of time, according to requirements.

" It is also desirable automatically to control the operation of the burners so as to be able to select both the time and the amount of' heat to be applied in a given cooking operation.

Controls for accomplishing the objects hereinabove set forth have heretofore been produced;

but it is the object of the present invention to produce an improved and simplified form of control which will be effectivefor the purpose intended.

These and other objects are eife'cted by the invention as will be apparent from the following 1, showing the apparatus adjusted for manual instead of automatic operation:

Fig. 4 is a fragmentary sectional view on line IV-IV of Fig. 2;

a Fig. 5 is a section on line V.V of Fig. 1; and

Fig. .6 is a section on line JVIVI of Fig. 3. Referring to the drawing and more particularly to Fig. 1, I0 designates agas burnerhaving concentric burner rings l2 and 14. For the purpose of this specification, .the ring l2 will be assumed to be the high-flame burner and the ring l4 will be considered as the low flame or .simmer burner. The gas burner l0 is'connected by two conduits l6 and I8 leading to the burner rings 12 and I4,respectively, in the usual way. The conduits l6 and I8 are selectively controlled by a valve 20, which isonly shown in elevation since it is now available on the market and well-known to the trade as a Harper valve. The function of this valve is to permit the gas to reach both of the burners l2 and 14 or selectively to shut the gas from one or the other or from both of said burners. The parts heretofore described form no part of the present invention.

According to the present invention, it is desired to provide means for automaticallyand selectively controlling the operation of the burnerrings" l2.

- ating "knob 30.

' shaft 26, next to the pin 42, is a sleeve 44.

and i4. To this end, the stem operating the valve 20 is extended in the form of a shaft 22, the entire valve being suitably secured to a framework 24 which may be part of the range structure or which may be a separate support secured to the range. An operating shaft 26 extends through a wall 28 of the framework .24 and carries an actu- The stem shaft 26 extends through and is rotatable in a bushing or bearing 1 32 carried by and extending through the wall 28.

On the inner'side of the wall 28 (or right-hand side; as viewed in Fig. l, and on the left-hand side, as viewed in Figs. 5 and 6), the shaft 26 loosely carries a bushing 34. The bushing 24 carries a clock spring 36, one end of which is anchored t0 the bushing 34 and the other end of which is anchored to the frame 24, as at 38. In order to cause the bushing 34 to rotate with the shaft 26 when such rotation is desired, the bushing 34 'is provided with a notch 40 adapted to engage a pin on the shaft 26 so as to lock the bushing 34 to the shaft 26. Fixed to the end of the The sleeve 44 has a slot 46 which engages a pin 48 'on the stem 22 to integrate the stem 22 and shaft 26 for joint rotation as long as the pin 42 engages the slot 40. The shaft 26 is biased ina direction to cause the pin 42 to engage the slot 40 by a coil spring 50 bearing on the remote end of the sleeve 44; as shown in Figs. 1 and 2.

The clock spring 36 functions to turn the bushing 34, and hence theshaft 26 and stem 22, in a direction closing the valve 20. In other words,

when the knob 31! is turned, say in counterclockwise direction, the valve 20 is partially or wholly opened and gas flows through the conduits [6 or 18, or both, into the burners l2 and I4, or either of them as the case may be. If the knob 30 is released and no provision is made to retain it in the position to which it has been moved, the energy stored in the spring-3G will cause the shaft 26 and the stem 22 to turn in clockwise direction to close the valve 20.

i In order to provide means for retaining the stem 22 and shaft 26 against shutting the valve I 20 except as desired, the bushing 34carries a cam 52 having two engaging stops 54 and 56 which are angularly spaced apart a sufficient distance to permit-operation in the manner hereinafter described. The cam 52 is also provided with a stop 58, which, when the cam rotates in clockwise direction, as shown in Fig. 2, will abut against a stop 60 to limit rotation of the shaft 26. Disposed v above the cam 52 and pressed downwardly by its 62 which is pivoted, at 84, to a lug 66 carried by the front wall 28 or forming part thereof. The lever 62 is provided with a pin 68 which is adapted to lie transversely of the cam 52, and to engage the stops 54 or 56 of the cam to prevent rotation of the cam under action of the spring 36. In other words, when the knob 30 is turned to fullopen position in counterclockwise direction, the cam 52 will also revolve until both of the stop 54 and 56 of the cam are tothe leftof the pin. 68, as viewed in Fig. 2. When the knob; 3 is released, the energy stored in the spring 36 will turn the cam 52 in a clockwise direction until the stop 5 4,. engages the pin 68. The parts will remain in this position until the lever 62 israised sufficientlyto permit the pin 68 to clear the stop 5.4 ,Whi n this is done, the shaft 26 and the stem 22 will turn in clockwise or valve-closingcllrectient. Iii the lever 62 is maintained in its raised posit ion for a sufiicient length of time, the shaft 26, cam 52' and. em Wi t r n eleekw se dire ion til he va v is c m let ly losest. If the e er 62* is n ra d. momentar l and h m s. a ain so h h clea s nly; h tep 4 e s the es ei si en he e n sutieee then n 68 w l e gage he p 5. will pei it. the shaft. 26 e el slve te 22; te urn; su he ent t'. to.-

the pin 62 and raise the lever 62. This causes the pin 68 to rise with the pin 92 until, at the exact moment that the pin 92 is about to drop oil? the high point of the cam 88, the pin 68 has been raised sufficiently to clear the stop 54. The spring 36 now revolves the shaft 26 and the stem 22 in a valve-closing direction, but before the stem 'cam 52, the gas is shut off from the burner I2,

close the main burner ring l2 while illlg sjn lpl e r burner onti u to operate When. helever- 62 s again r he p 68 eleer ..-the.s 6. and; the. shaft 26 and stern 22 will revolve; until; the; valve 2 i o e ely s t e xti guish hemaln: rner n e pro i9 3 uteinetie een tel. oi: h Operation th s fa ees t beetis ee sha es.- ion sleek e han s Whieh is. l n tteted. on y diagrammatically s n e it, may be t a y n en i al sign- T e l e meehe ism n.- ludes a shaft 14 dap ed to be a tua ed b es ventional spring or electric power- (not shown e ha c u tes a pa of ears .6L and. w h, in turn, a i esh th sea 0 nd e gea 80 s a ried by a. s eev 4 and. he ear 82, s carr by a s a t .6 whieh s freely ata e Within e sleeve, .4-. sleeve. .41 ca r i n 8 an he. s ai 6; ean e ese. cam 9 he eems and; b insredant dto-eet on. a p a n d b anentens en o th lever 2,

shown in h s The sleev 84. and shaft 86.1 are provided with setting; knobs: 9A and 9.6, Th setting; knob 4 s ute ise i with a pointer- 98 ic is d p ed. t sh et. w th a d al 1: n he e n kheb is Provi ed th a pointer I02- adapted to coact with a second dial I04 on the tace'ei e sle meehenism.

i Operation t t i e d to u e th burners l2 end- .4. jointly er a i o iii een min tes-and. the. bur r 4 alone r a e elnet d; Q .he.h u1:,; th neb 4 i t rn d ntil. the nein entt hereof: P n s. to the m ra 1. on the dial. .Hu: and the knob 96 is turned until the pgmt 1.0.2 e e ts to the numeral 6Q enthe dial 1. .0. e kneb tu ned eeunt re oeles. wise n i he m ste s 54. nd- 56. clea hepin 6.8. to b o urn r I! end. 4, The e t sp n 14. to lo e. he a ve-is eeent teeteli y e gagem n of, he sten 5. wit tth n Simu ta e u y the e eeh. eeh hlsm whether it; be of he pr er, l ctric tyne, sse i metienr At. th r ien oi. fii een. minutes the sleeve; 8.4. w ll. h be rned, by he sha t 1 anti. seene, s fiieientl te censethe eem tteeneaee he a e i ew o en d. and. a s flows.

but. the. burner. 14 remains supplied with gas. Whenthe clock mechanism has measured an additional period of 45 minutes, the shaft 86 will have been turned; by gearing 18 and 82 to cause the can; to engage the pin 82 and again raise the lever 62. This again causes the pin 68 to he: ste hus. eermitt ns: 5 shaf -.2 nd. stem, e turne by he; spe he; at unt l-the. st p .8 abuts a ainst he step. 6% Betere' .th te 5.8; hes eeehea he s ep 6.0, the; valve. 29. will. ha e ee ee hpletely cl sed; eshllt. the. lea ei. tem the ma n. butnet Whi e I have shown the sllm 1. s; tevidinz. e ne. hour: nd. iraetiens hereei-i t is; ebr eu that the. ealibta ien; man be when; QQIQ PE t req ie hent a When it is elesltel teeeetate; the burners-inset. nehe eht yei theau emetienteehehisni deseribe the .sheit. 6; is ushed. inweni ys. 2 tame-left as. v-lewee in f iest sen n l the. in. 4.2.:Q1BQKS; he. hatch. 4.01 1 51" the. hheb. i ytu ned ts cause the. p n; .2: s tide en h edseet he bus in 3. es. shown in Fig. 6. This frees the bushing 35, cam .2. a d. eein fremtheshaittfi. b t the eneasement eithe. pin. 12 with the.- sl t .6 the leeve, keeps he shat-t; Zliandthestem 2.2; in. e eted e joint. o ation;- I thisposition, the s n be n l y tunned on, regulated or hutof Whetl e aim sr.

The. eem atien. withv ages; burner havi a ma n burner tins and auxiliarybutnerrin a pair of conduits for supplying fuel to-.said;bllrn-. e1. rings: and a; valve-ion shu ting of the flowof fluid threush; onev or bo h at said conduits anda valve stem for opening. said;va1ve, ofr'mea-nsfor automatically actuatina said valve to. shut the flow of fuel through one of said cohduitsupon. thelapse ot a predetermined relatively short period of tirne. and to shut: the flow of fuel through thejother of said conduits upon the lapse of a relatively long period of time. comprising, a main shaft operatively connectei to. said stem and-roe tatable. in a valve-opening direction, a main cam carriedi by said.- shaft, 2. pairoif. angulanlyespaced. stops. carried by saidshaft, a coil: spring adapted to. be wound-up to store energ-y when said' shaft is turned in valveaopening, direction, said: spring biasing said. shaft; inv EEIVGztClQSiHQ direction, an arm. pivoted: iorrqtation. aboutea horizontal axis. a first. carried: by. said arm. and. adapted; ta engage said stops, a. time measuring device in. cluding a stub. shaft, means for; rotating: said-stun shaft-,a. sleeve coaxial with said stub shaft and. mehhsfor-rotating said-stub shaft and: saidtsleeva aiirst cam carried 'bywsaid shaft; a. second cart.

1 8. 1" y: said. sleeve, means; for settinz 'sald. .cams-. so that the effective portionsgthereorwillhe angua. lal yr' spaced. and: a second; pin carried? bytsaid trans erse y endowment resume on the, ner nhe eywoirhetlt :0! 'seidcfirsia and: aeccncl'cams;

of time and whereby said spring will rotate" said 10 shaft in valve-closing direction to shut the flow of fuel from the other of said conduits upon the lapse of the long period of time.

2. The structure recited in claim 1 together with means for temporarily disengaging said main cam and said spring from saidmain shaft to permit manual opening and closing of said valve.

GUSTAV KLEIN. 

